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GEORGE s. Kurier, or

vLetters-Patent No. 94,120, datedAngnst 24, 1869.

PHOTOGRAPHIC CAMERA-STAND.

The Schedule referred to in these Letters Patent and making part of; thesame.

To all whom it may concern:

Be it known that I, GEORGE S. KNAPP, of Winona, inthe county-ot` Winona,and State of Minnesota, have invented certain new and usefulImprovements in Stands for Photographers and others; and I do herebydeclare that the following is a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings, making partof this specification, and to the letters of reference marked thereon,like letters indicating'like parts wherever they occur.

'.lo enable those skilled in the art to vconstruct and use'inyinvention,.I will proceed to describeit.

My invention relates to camerastands for photographers; and consists ina novel manner of constructing and arranging the same, so as to renderthe instru ment capable of various adjustments and inclinations, ashereinafter described; iu providing thisjadjus'table iiame with a rackor frame tohold pictures while being copied; and, in mounting the wholeupon a cup,

board or case, to contain 'additional instruments, Snc.

, In the drawiug- Figure 1 is a longitudinal vertical section through mystand, on the `line :on: of iig. 2;

Figure 2 is a cross-section of the same, ou the. line y y 0f fig 1; and

Figure 3 is a vertical section through the centre of a tripod, uponwhich the adjustable stand is placed for field-use. v

In constructing my apparatus, I provide a cupboard or closet, A, andmake a hole in its top of the proper size to admit a post or standard,B; and'be1ow,and on opposite sides of .this hole, I secure the twoparallel, vertical guides or ways f-,as shown in fig. 1.

Through the hole in the top of the cupboard, I insert the post B,running between the guides f, and provide it on one side with Aa rack,a, meshing into a pinion, c on the inner end of a horizontal shaft, c.

lhe outer end of the shaft c projects outside of the cupboard, and isprovided with a hand-wheel, by turning which the pinion c is operated,and the post B raised or lowered. 1 Y

Through one side ofthe cupboard, I insert-arod, K, extendingdn to thepost B, andprovided for a portion of its length with a screw-thread,running in a stationary nut, so that by turning this rod, its inner endmay be forced against the post, and thus lock the latter in place.

Incxt construct a stand or frame, C, mounted upon a rod-or standard,(ir, and insert the lower end of this rod into'a hole in the top ofthepost 'or rack-barB, as in fig. 1. 1

The manner of connecting the frame C to the rod G is clearly shown intig. I; the frame having secured to its under side, at the middle, aball, ,-and the upper end of the rod having a corresponding recess, intowhich the ball is set, thus supporting the frame, but allowing it to beturned and tipped in any direction upon the ball as a pivot.

' To provide for locking the frame C in any of the required positions, Itake two semicircular bars, c and f, and passt-hem at right angles toeach other through slots in the post or rod G, and hinge their ends tothe under side of flame C, as shown, and, in the rod iGr, I

locate two set-screws, g and h,'each of which bears against one of thesaid bars, so that after adjusting the table as desired, it may b efastenedligidly bysetting up the screws g and h, and thus clamping thev'curved 0n the front end of the frame C, I form a raised ledge, andplace on its rear side one or more points or projections o, under whichthe frontvedge of the camera is engaged. I also locate von or across theframe C, a sliding bar, p, having pivoted ou it a lever, k', to the rearend of which is pivoted a cam-lever, t, the lower side'of this lever, t,bearing on a'piu projecting from a spring, an, which latter is securedto the under side of bar 11, between it and the frame C. i

The camera being placed upon the frame G, with its front edge 'under orAagainst points i, the bar p is shoved forward until the frontend oflever Men gages over the hrear edge of the camera, and then the lever tturned down, thus lockinguthe lever down, and at the same timeforcingthe spring m down, and clamping the bar p in place, and securingthe instrument rigidly to' the frame C.

At' one ,end 'of the frame C, I locate a spirit-level, q, by which toadjust the frame.

In the upper part of the cupboard A, I locate drawers F, to containtools, chemicals, Src.

In this manner,I produce a very strong and simple stand, to which thecamera may be secured, and then raised, lowered, turned, tipped, orotherwise adjusted, as occasion requires.

For the purpose of holding pictures to be copied, I provide a detachableframe or rack, D, having its siderails, r, passed through guides orblocks, which arc secured to the under side of the frame C.

This frame D may be adj usted by means of a thumbscrew, s, one end o fwhich is connected to thc frame C, this screw running through astationary stud, t', onl frame I), as shown in gnl.

At the outer end of the frame I), I place a block, lm', moving in a slotwhich extends across the frame, and which .may be adjusted in said slotby means of a screw, x, shownvclearly in figs. l and 2.

Through the block on', I make an opening and insert a'vertical bar, y,which may be moved up or down through the block, by turning a screw-rod,5, provided for the purpose.

On the bar y, vl place a movable block or jaw, c', provided with aset-screw, b', by which it may be fastened at any point on the bar; andon the upper end of the bar, I form a head, f', with a projecting lip orface.

, lhe picture to be copied is placed on the front of the bar y, with itsupper edge engaged under head f', and t-he clamp a. is shoved up againstits lower edge, and fastened by the set-screw, thus fastening thepicture in anupright position in front of the instrument.

The screws x and z are turned to adjust the picture to the exactposition required.

NVhen the frame D is not required for use, the nut t is removedand\theframe withdrawn ii'om the guides or blocks.

When my apparatus is to be used out of doors or in the field, I placethe adjustable flame C upon a. tripod, R, shown in fig. 3.

lhis tripod is provided with. au adjifstable thimblc or tube, d, intowhiclrthe standard G is set, and fastened by a thumb-screw, e', the tubecl being raised as desired, and lastened by thumb-screw c', shown infig. 3.

In this manner, I produce a stand capable of universal adjustinenaandstill of great simplicity.

By slight variations of the devices for` clamping the instruments, Ican'adapt my stand to the use of sux"- veyors, astronomers, and similarpurposes, as well as for photographers.

Having thus described my invention,

1. The frame C, provided with the ball i, hearing in the socket vj ofpost G, and having the hinged segments e and f, arranged as described.

GEO. KNAW.

lVitnesses:

JosIAH H. JoNEs, JOHN J. RANDALL.

2. The detachable and adjustable frame D,provided

